Xiaotong Wei , Shucong Zhang , Xingshuai Lv , Shuixing Dai , Huanlei Wang , Minghua Huang
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引用次数: 0
Abstract
Coupling hydrazine electrooxidation with hydrogen evolution reaction (HER) attracts ever-growing attention for energy-saving H2 production. However, the performance of hydrazine-assisted HER unit is restricted by the bifunctional catalysts with un-fully activated sites. Herein, a surface local-reconstruction strategy is proposed to integrate amorphous Co(OH)2 and P vacant CoP into the CoH-CoPV@CFP catalyst. The inherent electron-deficient Co sites in Co(OH)2 show strong N-Co interaction to accelerate the N2H4 dehydrogenation kinetics, while the as-formed P vacancies in CoP play a crucial role in moderating the H* adsorption energy, the excellent bifunctionality thus being obtained. Specifically, it achieves the low overpotentials of − 77 and − 61 mV at 10 mA cm−2 for HER and HzOR in alkaline media, respectively. A lab-scale electrolyzer can deliver the industrial-grade current density of 500 mA cm−2 under ultralow cell voltage of 0.23 V. This local-reconstruction strategy may pave new avenue to design efficient catalysts for hydrazine-assisted H2 generation.
期刊介绍:
Applied Catalysis B: Environment and Energy (formerly Applied Catalysis B: Environmental) is a journal that focuses on the transition towards cleaner and more sustainable energy sources. The journal's publications cover a wide range of topics, including:
1.Catalytic elimination of environmental pollutants such as nitrogen oxides, carbon monoxide, sulfur compounds, chlorinated and other organic compounds, and soot emitted from stationary or mobile sources.
2.Basic understanding of catalysts used in environmental pollution abatement, particularly in industrial processes.
3.All aspects of preparation, characterization, activation, deactivation, and regeneration of novel and commercially applicable environmental catalysts.
4.New catalytic routes and processes for the production of clean energy, such as hydrogen generation via catalytic fuel processing, and new catalysts and electrocatalysts for fuel cells.
5.Catalytic reactions that convert wastes into useful products.
6.Clean manufacturing techniques that replace toxic chemicals with environmentally friendly catalysts.
7.Scientific aspects of photocatalytic processes and a basic understanding of photocatalysts as applied to environmental problems.
8.New catalytic combustion technologies and catalysts.
9.New catalytic non-enzymatic transformations of biomass components.
The journal is abstracted and indexed in API Abstracts, Research Alert, Chemical Abstracts, Web of Science, Theoretical Chemical Engineering Abstracts, Engineering, Technology & Applied Sciences, and others.